ITT after take-off and initial climb

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metzgergva
Posts: 91
Joined: Wed Jun 28, 2017 8:09 pm
ITT after take-off and initial climb

Post by metzgergva » Thu Jan 23, 2020 5:51 pm

Just seeking confirmation that the current shown ITT after take-off and initial climb is correct for the KA350i. I'm asking as my experience from other aircraft with the same type of engine showed a different relationship on TQ and ITT at low altitudes. Also the provided TQ diagram suggests that it is feasible to use 95-98% TQ after TO, but with that the ITT is running at the limit if not above.
My experience is that initial climb can be flown with nearly full TQ and ITT is well below limit, but ITT gradually continues to climb with altitude and somewhere at 14-16000 ft ITT becomes the limiting factor for TQ, as also shown in the TQ diagram.
Comments welcomed!

Taguilo
Posts: 658
Joined: Sun May 11, 2014 11:49 am
Re: ITT after take-off and initial climb

Post by Taguilo » Thu Jan 23, 2020 10:15 pm

Hi,

Engine parameters were updated and new values will be available for the SP.

As a reference, take a look at these pics (ISA conditions):

Sprite 29.jpg
Sprite 29.jpg (605.38 KiB) Viewed 688 times

Top pic is 1700 RPM, climbing through 18,000 ft with max torque and ITT below 820 C limit.
Middle pic is 1600 RPM leveled at 19,000 ft. still max torque and ITT a bit cooler.
Bottom pic is 1500 RPM (max cruise table) at 19,000 , max torque and ITT below 800 C.

Sprite 39.jpg
Sprite 39.jpg (185.76 KiB) Viewed 688 times


Tomas

metzgergva
Posts: 91
Joined: Wed Jun 28, 2017 8:09 pm
Re: ITT after take-off and initial climb

Post by metzgergva » Fri Jan 24, 2020 9:07 am

Great to see this improvement. Thank you.


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